1. Design and manufacture conform to BS5351;
2. Connection ends conform to:
1) Socket welded ends conform to ANSI B16.11;
2) Screw ends conform to ANSI B1.20.1;
3) Butt-welded ends conform to ANSI B16.25;
4) Flanged ends conform to ANSI B16.5;
3. Test and inspection conform to: API 598;
4. Structure features: Bolted bonnet, Three-piece;
5. Materials conform to ANSI/ASTM;
6. Main materials: A105, LF2, 304(L), 316(L), F347, F321, F51, Monel, 20 Alloy.